Composite material having an intermetallic matrix of AlNi reinfo

Details Composite material having an intermetallic matrix of AlNi reinfo Composite material having an intermetallic matrix of AlNi reinfo

1994-07-12

1996-09-17

Andrews, Melvyn

Metal treatment

Stock

Nickel base

148442, C22C 1903, C22C 3000

Patent

active

055564860

ABSTRACT:
The invention relates to a composite material comprising a matrix mainly constituted by an intermetallic compound of the AlNi type containing in solid solution 1.5 to 30 atom % silicon and a reinforcement formed from silicon carbide (SiC) particles dispersed in said matrix.
In said material, the presence of silicon leads to a thermodynamic equilibrium system no longer evolving by SiC reinforcement/matrix chemical reaction when raised to a high temperature.
This material can be prepared by conventional processes by adding the silicon to the starting material or by carrying out a limited reaction during the preparation between an AlNi matrix and the silicon carbide particles.

REFERENCES:
patent: 4906531 (1990-03-01), Ohmura et al.
patent: 4915903 (1990-04-01), Brupbacher et al.
Journal of Materials Science Letters, vol. 9, No. 5, May 1990 pp. 503-505, Rawers, J. C. et al "Melt Infiltration of Selected Intermetallics Into Silicon".
Database WIP, Section Ch, Week 8517, Derwent Publications Class M26, An 85-103298 & JP-A-60 050 138 Showa Denko Mar. 1985.
Chemical Abstracts, vol. 115, No. 16, Oct. 1991, Abstract No. 164273k, Chou, T. C. et al "The Formation of NiAl phase . . . Reactions", 1045-1050, 1991.

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